Commit 7476bd79 authored by Dan Williams's avatar Dan Williams

async_pq: convert to dmaengine_unmap_data

Use the generic unmap object to unmap dma buffers.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Reported-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
[bzolnier: keep temporary dma_dest array in do_async_gen_syndrome()]
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 3bbdd498
...@@ -46,49 +46,25 @@ static struct page *pq_scribble_page; ...@@ -46,49 +46,25 @@ static struct page *pq_scribble_page;
* do_async_gen_syndrome - asynchronously calculate P and/or Q * do_async_gen_syndrome - asynchronously calculate P and/or Q
*/ */
static __async_inline struct dma_async_tx_descriptor * static __async_inline struct dma_async_tx_descriptor *
do_async_gen_syndrome(struct dma_chan *chan, struct page **blocks, do_async_gen_syndrome(struct dma_chan *chan,
const unsigned char *scfs, unsigned int offset, int disks, const unsigned char *scfs, int disks,
size_t len, dma_addr_t *dma_src, struct dmaengine_unmap_data *unmap,
enum dma_ctrl_flags dma_flags,
struct async_submit_ctl *submit) struct async_submit_ctl *submit)
{ {
struct dma_async_tx_descriptor *tx = NULL; struct dma_async_tx_descriptor *tx = NULL;
struct dma_device *dma = chan->device; struct dma_device *dma = chan->device;
enum dma_ctrl_flags dma_flags = 0;
enum async_tx_flags flags_orig = submit->flags; enum async_tx_flags flags_orig = submit->flags;
dma_async_tx_callback cb_fn_orig = submit->cb_fn; dma_async_tx_callback cb_fn_orig = submit->cb_fn;
dma_async_tx_callback cb_param_orig = submit->cb_param; dma_async_tx_callback cb_param_orig = submit->cb_param;
int src_cnt = disks - 2; int src_cnt = disks - 2;
unsigned char coefs[src_cnt];
unsigned short pq_src_cnt; unsigned short pq_src_cnt;
dma_addr_t dma_dest[2]; dma_addr_t dma_dest[2];
int src_off = 0; int src_off = 0;
int idx;
int i;
/* DMAs use destinations as sources, so use BIDIRECTIONAL mapping */ dma_flags |= DMA_COMPL_SKIP_SRC_UNMAP | DMA_COMPL_SKIP_DEST_UNMAP;
if (P(blocks, disks)) if (submit->flags & ASYNC_TX_FENCE)
dma_dest[0] = dma_map_page(dma->dev, P(blocks, disks), offset, dma_flags |= DMA_PREP_FENCE;
len, DMA_BIDIRECTIONAL);
else
dma_flags |= DMA_PREP_PQ_DISABLE_P;
if (Q(blocks, disks))
dma_dest[1] = dma_map_page(dma->dev, Q(blocks, disks), offset,
len, DMA_BIDIRECTIONAL);
else
dma_flags |= DMA_PREP_PQ_DISABLE_Q;
/* convert source addresses being careful to collapse 'empty'
* sources and update the coefficients accordingly
*/
for (i = 0, idx = 0; i < src_cnt; i++) {
if (blocks[i] == NULL)
continue;
dma_src[idx] = dma_map_page(dma->dev, blocks[i], offset, len,
DMA_TO_DEVICE);
coefs[idx] = scfs[i];
idx++;
}
src_cnt = idx;
while (src_cnt > 0) { while (src_cnt > 0) {
submit->flags = flags_orig; submit->flags = flags_orig;
...@@ -100,28 +76,25 @@ do_async_gen_syndrome(struct dma_chan *chan, struct page **blocks, ...@@ -100,28 +76,25 @@ do_async_gen_syndrome(struct dma_chan *chan, struct page **blocks,
if (src_cnt > pq_src_cnt) { if (src_cnt > pq_src_cnt) {
submit->flags &= ~ASYNC_TX_ACK; submit->flags &= ~ASYNC_TX_ACK;
submit->flags |= ASYNC_TX_FENCE; submit->flags |= ASYNC_TX_FENCE;
dma_flags |= DMA_COMPL_SKIP_DEST_UNMAP;
submit->cb_fn = NULL; submit->cb_fn = NULL;
submit->cb_param = NULL; submit->cb_param = NULL;
} else { } else {
dma_flags &= ~DMA_COMPL_SKIP_DEST_UNMAP;
submit->cb_fn = cb_fn_orig; submit->cb_fn = cb_fn_orig;
submit->cb_param = cb_param_orig; submit->cb_param = cb_param_orig;
if (cb_fn_orig) if (cb_fn_orig)
dma_flags |= DMA_PREP_INTERRUPT; dma_flags |= DMA_PREP_INTERRUPT;
} }
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
/* Since we have clobbered the src_list we are committed /* Drivers force forward progress in case they can not provide
* to doing this asynchronously. Drivers force forward * a descriptor
* progress in case they can not provide a descriptor
*/ */
for (;;) { for (;;) {
dma_dest[0] = unmap->addr[disks - 2];
dma_dest[1] = unmap->addr[disks - 1];
tx = dma->device_prep_dma_pq(chan, dma_dest, tx = dma->device_prep_dma_pq(chan, dma_dest,
&dma_src[src_off], &unmap->addr[src_off],
pq_src_cnt, pq_src_cnt,
&coefs[src_off], len, &scfs[src_off], unmap->len,
dma_flags); dma_flags);
if (likely(tx)) if (likely(tx))
break; break;
...@@ -129,6 +102,7 @@ do_async_gen_syndrome(struct dma_chan *chan, struct page **blocks, ...@@ -129,6 +102,7 @@ do_async_gen_syndrome(struct dma_chan *chan, struct page **blocks,
dma_async_issue_pending(chan); dma_async_issue_pending(chan);
} }
dma_set_unmap(tx, unmap);
async_tx_submit(chan, tx, submit); async_tx_submit(chan, tx, submit);
submit->depend_tx = tx; submit->depend_tx = tx;
...@@ -188,10 +162,6 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks, ...@@ -188,10 +162,6 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
* set to NULL those buffers will be replaced with the raid6_zero_page * set to NULL those buffers will be replaced with the raid6_zero_page
* in the synchronous path and omitted in the hardware-asynchronous * in the synchronous path and omitted in the hardware-asynchronous
* path. * path.
*
* 'blocks' note: if submit->scribble is NULL then the contents of
* 'blocks' may be overwritten to perform address conversions
* (dma_map_page() or page_address()).
*/ */
struct dma_async_tx_descriptor * struct dma_async_tx_descriptor *
async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
...@@ -202,26 +172,69 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks, ...@@ -202,26 +172,69 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
&P(blocks, disks), 2, &P(blocks, disks), 2,
blocks, src_cnt, len); blocks, src_cnt, len);
struct dma_device *device = chan ? chan->device : NULL; struct dma_device *device = chan ? chan->device : NULL;
dma_addr_t *dma_src = NULL; struct dmaengine_unmap_data *unmap = NULL;
BUG_ON(disks > 255 || !(P(blocks, disks) || Q(blocks, disks))); BUG_ON(disks > 255 || !(P(blocks, disks) || Q(blocks, disks)));
if (submit->scribble) if (device)
dma_src = submit->scribble; unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOIO);
else if (sizeof(dma_addr_t) <= sizeof(struct page *))
dma_src = (dma_addr_t *) blocks;
if (dma_src && device && if (unmap &&
(src_cnt <= dma_maxpq(device, 0) || (src_cnt <= dma_maxpq(device, 0) ||
dma_maxpq(device, DMA_PREP_CONTINUE) > 0) && dma_maxpq(device, DMA_PREP_CONTINUE) > 0) &&
is_dma_pq_aligned(device, offset, 0, len)) { is_dma_pq_aligned(device, offset, 0, len)) {
struct dma_async_tx_descriptor *tx;
enum dma_ctrl_flags dma_flags = 0;
unsigned char coefs[src_cnt];
int i, j;
/* run the p+q asynchronously */ /* run the p+q asynchronously */
pr_debug("%s: (async) disks: %d len: %zu\n", pr_debug("%s: (async) disks: %d len: %zu\n",
__func__, disks, len); __func__, disks, len);
return do_async_gen_syndrome(chan, blocks, raid6_gfexp, offset,
disks, len, dma_src, submit); /* convert source addresses being careful to collapse 'empty'
* sources and update the coefficients accordingly
*/
unmap->len = len;
for (i = 0, j = 0; i < src_cnt; i++) {
if (blocks[i] == NULL)
continue;
unmap->addr[j] = dma_map_page(device->dev, blocks[i], offset,
len, DMA_TO_DEVICE);
coefs[j] = raid6_gfexp[i];
unmap->to_cnt++;
j++;
} }
/*
* DMAs use destinations as sources,
* so use BIDIRECTIONAL mapping
*/
unmap->bidi_cnt++;
if (P(blocks, disks))
unmap->addr[j++] = dma_map_page(device->dev, P(blocks, disks),
offset, len, DMA_BIDIRECTIONAL);
else {
unmap->addr[j++] = 0;
dma_flags |= DMA_PREP_PQ_DISABLE_P;
}
unmap->bidi_cnt++;
if (Q(blocks, disks))
unmap->addr[j++] = dma_map_page(device->dev, Q(blocks, disks),
offset, len, DMA_BIDIRECTIONAL);
else {
unmap->addr[j++] = 0;
dma_flags |= DMA_PREP_PQ_DISABLE_Q;
}
tx = do_async_gen_syndrome(chan, coefs, j, unmap, dma_flags, submit);
dmaengine_unmap_put(unmap);
return tx;
}
dmaengine_unmap_put(unmap);
/* run the pq synchronously */ /* run the pq synchronously */
pr_debug("%s: (sync) disks: %d len: %zu\n", __func__, disks, len); pr_debug("%s: (sync) disks: %d len: %zu\n", __func__, disks, len);
......
...@@ -953,9 +953,12 @@ static void dmaengine_unmap(struct kref *kref) ...@@ -953,9 +953,12 @@ static void dmaengine_unmap(struct kref *kref)
dma_unmap_page(dev, unmap->addr[i], unmap->len, dma_unmap_page(dev, unmap->addr[i], unmap->len,
DMA_FROM_DEVICE); DMA_FROM_DEVICE);
cnt += unmap->bidi_cnt; cnt += unmap->bidi_cnt;
for (; i < cnt; i++) for (; i < cnt; i++) {
if (unmap->addr[i] == 0)
continue;
dma_unmap_page(dev, unmap->addr[i], unmap->len, dma_unmap_page(dev, unmap->addr[i], unmap->len,
DMA_BIDIRECTIONAL); DMA_BIDIRECTIONAL);
}
mempool_free(unmap, __get_unmap_pool(cnt)->pool); mempool_free(unmap, __get_unmap_pool(cnt)->pool);
} }
......
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